Trapped aboard an apocalyptic locomotive hurtling through demonic dimensions, ordinary contestants scream in panic as monstrous SSS-class entities slaughter anyone who breaches supernatural rules. While other players desperately hoard weapons and talismans, human medic Luci approaches the horrific entities carrying an ordinary leather medical bag and a digital billing scanner.
Treating eldritch succubi, weeping blood angels, and homicidal spectral princesses with clinical detachment and psychiatric counseling, Luci discovers that severe spiritual trauma is what drives their psychotic rampages. Curing their psychological afflictions one patient at a time, Luci turns the realm's most feared nightmares into fiercely protective VIP clients.
